Cita APA (7th ed.)

Gettman, D. (1987). Basic Montessori: Learning activities for under-fives. C. Helm.

Cita Chicago (17th ed.)

Gettman, David. Basic Montessori: Learning Activities for Under-fives. London: C. Helm, 1987.

Cita MLA (9th ed.)

Gettman, David. Basic Montessori: Learning Activities for Under-fives. C. Helm, 1987.